CN115109946B

CN115109946B - Aluminum impurity purification device for recycling waste aluminum

Info

Publication number: CN115109946B
Application number: CN202210916412.4A
Authority: CN
Inventors: 葛建明
Original assignee: Nantong Yuqi Metal Products Co ltd
Current assignee: Nantong Yuqi Metal Products Co ltd
Priority date: 2022-08-01
Filing date: 2022-08-01
Publication date: 2023-07-14
Anticipated expiration: 2042-08-01
Also published as: CN115109946A

Abstract

The invention discloses an aluminum impurity purification device for recycling aluminum scraps, which comprises a melting furnace body, a refractory tank body and a treatment container body, wherein a cliff opening is arranged between the refractory tank body and the treatment container body, and an oxygen isolation cover body is arranged at the outer side of the refractory tank body; the inside that holds the body is connected with negative pressure subassembly to refractory tank body outside, the separation layer subassembly that is equipped with separation aluminium liquid and impurity membrane is handled to separation layer subassembly's centre department is equipped with discharge subassembly, this aluminium scrap recovery is with aluminium impurity purification device, through setting up the cliff mouth between refractory tank body and handling the appearance body, effectively avoid aluminium liquid backward flow, simultaneously because the top department at the refractory tank body sets up negative pressure subassembly, thereby be favorable to taking out the part with the air of refractory tank body department, be convenient for keep the aluminium of refractory tank body department at negative pressure entering separation layer subassembly department, utilize separation layer subassembly to filter the separation with the impurity layer in the aluminium liquid, mixed other impurity layers in the aluminium layer have been reduced, be convenient for aluminium liquid discharges fast, and reduced the secondary pollution to the aluminium liquid in the filtration process.

Description

Aluminum impurity purification device for recycling waste aluminum

Technical Field

The invention relates to the technical field of aluminum recovery, in particular to an aluminum impurity purification device for waste aluminum recovery.

Background

The waste aluminum sources in China mainly have two aspects, namely, imported from abroad, currently takes the main place, and in fact, imported waste aluminum is imported resources and energy, namely, energy conservation, emission reduction and environmental protection; secondly, the aluminum accumulated in the society is not much in China, and the scrapped high tide period of aluminum parts does not come yet, so that the recovered aluminum scraps can not meet the requirements of economic construction in China, the first step of the production process flow of the regenerated aluminum is sorting and classifying, also known as preprocessing, the finer the sorting is, the more accurate the classifying is, the more accurate the chemical components of the regenerated aluminum are, and the higher the economic benefit is, so that the sorting and classifying become a key process for the production of the regenerated aluminum. The sorting and classifying principle and purpose are to remove other metals and non-metals mixed in the waste aluminum, classify according to the composition or alloy mark to make full use of the waste aluminum, clean and dry oil stain, paint, water and the like of the waste materials, make the waste aluminum completely accord with the condition of entering the furnace, and make the aluminum in the waste aluminum most economically and reasonably utilized.

Waste aluminum treatment and purification means that waste aluminum is discharged from a refractory tank body in a molten state after passing through a smelting furnace, and because aluminum and aluminum alloy melts have strong tendency of hydrogen absorption when being discharged through the refractory tank body in the molten state, casting parts are air holes and loose and are easy to oxidize, oxide inclusions are produced, when aluminum liquid is discharged to the refractory tank body, formed oxidized impurities and the like are fished out from a slag discharge port, and impurities in the oxidized state easily cause molten aluminum backflow, are unfavorable for aluminum purification, are unfavorable for the impurities to be adhered to a bailing rod, and cause recontamination of molten aluminum liquid. For this purpose, we propose an aluminum impurity purification device for scrap aluminum recovery.

Disclosure of Invention

The invention aims to provide an aluminum impurity purification device for recycling aluminum scraps, which aims to solve the problems in the background technology.

In order to achieve the above purpose, the present invention provides the following technical solutions: the aluminum impurity purification device for recycling the aluminum scraps comprises a melting furnace body and a refractory groove body connected with the melting furnace body, wherein one end of the refractory groove body is connected with a treatment container, a cliff port for preventing aluminum liquid from flowing backwards is arranged between the refractory groove body and the treatment container, and an oxygen isolation cover body is arranged on the outer side of the refractory groove body; the outer side of the refractory tank body is connected with a negative pressure component, one end of the negative pressure component is connected with an oxygen isolation cover body, the other end of the negative pressure component is connected with a treatment container body, and the bottom of the treatment container body is connected with a discharge notch; the inside of handling the appearance body is equipped with the separating layer subassembly of separation aluminium liquid and impurity membrane, separating layer subassembly intermediate position is equipped with the exhaust subassembly of separating layer subassembly's bottom clearance, and exhaust subassembly's one end is connected and is installed in the one end department of handling the appearance body at negative pressure subassembly.

Preferably, the outside of the oxygen isolation cover body is provided with a plurality of adjustment grooves, each adjustment groove is connected with a hinge seat, one side of the hinge seat is connected with a pressing strip, one end of the pressing strip is connected to the outside of the refractory groove body through a support plate, the other side of the hinge seat is connected with an adjustment steel rope, an adjustment piece is connected between the plurality of adjustment steel ropes, a reset spring is connected between two sides of the hinge seat, and the inner side of the oxygen isolation cover body is connected with an anti-sticking cover body.

Preferably, the adjusting piece comprises a mounting plate connected to one side of the refractory tank body, an adjusting rod is connected to the mounting plate, a winding cylinder body connected with a plurality of winding adjusting steel ropes is connected to the adjusting rod, and one end of the adjusting rod is connected with a rotating adjusting shaft block.

Preferably, the negative pressure assembly comprises a fixed seat connected to the outer side of the refractory tank body, the fixed seat is connected with a negative pressure pump body, the negative pressure pump body is connected with an oxygen pumping steel pipe, one end of the negative pressure pump body is connected with an air blowing steel pipe, and the air blowing steel pipe is communicated with the top of the treatment container body.

Preferably, the separating layer assembly comprises a guide rail, the guide rail is spiral, one end of the guide rail is arranged at the cliff, the other end of the guide rail is connected with a collecting frame body penetrating through the treatment container, a plurality of overflow grooves for discharging aluminum liquid are formed in the guide rail, the discharging assembly is located at the middle position of the guide rail, and the top of the discharging assembly is in contact with the blowing steel pipe.

Preferably, the drain assembly includes a wind chamber connected at a top cover of the processing volume. And the steel pipe of blowing is located wind cavity department, wind cavity department is equipped with the flabellum, and the flabellum bottom is connected with the axis of rotation, be connected with the torsional spring between axis of rotation and the wind cavity inner wall, guide rail intermediate position department is connected with the cylinder barrel, cylinder barrel department is connected with and stirs the piece, stir the top and the axis of rotation connection of piece, and stir the outside of piece and stir guide rail bottom.

Preferably, the stirring piece comprises a telescopic rod connected to the bottom of the rotating shaft, the bottom of the telescopic rod is connected with a connecting plate, a spiral track is arranged on the cylindrical barrel, the connecting plate is located at the spiral track and is connected with a sliding block, and the outer side of the sliding block is connected with a stirring rod stirring the guiding track.

Preferably, the outside of telescopic link is connected with fixed cover, and fixed cover outside equiangular connection has a plurality of curved bars, and the one end of curved bar is connected with sweeps the pole.

Preferably, the guide rail is connected with a convex slope at the position of the collecting frame body.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, the cliff is arranged between the refractory tank body and the treatment container body, so that aluminum liquid is effectively prevented from flowing back, and meanwhile, the negative pressure component is arranged above the refractory tank body, so that the air extraction part at the refractory tank body is facilitated, aluminum at the refractory tank body is conveniently kept at the position where negative pressure enters the separation layer component, the separation layer component is utilized to filter and separate an impurity layer in the aluminum liquid, and meanwhile, the extraction component is driven by the extracted negative pressure air to collect the filtered impurity layer, so that the aluminum liquid is kept to be spirally discharged from the discharge notch.

Drawings

FIG. 1 is a schematic diagram of the overall frontal structure of the present invention;

FIG. 2 is a schematic view of the overall rear structure of the present invention;

FIG. 3 is a schematic view of the structure of the treatment vessel of the present invention after the upper end cap is removed;

FIG. 4 is a schematic view of a partial explosion structure of the present invention;

FIG. 5 is a schematic view of the structure of the negative pressure assembly after being connected with the separation layer assembly;

fig. 6 is a schematic view of the bottom view of fig. 5

FIG. 7 is a schematic view of the structure of the discharge assembly of the present invention;

FIG. 8 is a schematic view of the structure of a separation layer assembly according to the present invention;

FIG. 9 is a schematic view of the structure of the refractory tank;

FIG. 10 is a schematic view of the structure of the adjusting member;

FIG. 11 is an enlarged view of the area A in FIG. 10;

fig. 12 is an enlarged view of the area B in fig. 10.

In the figure: 1-melting furnace body; 2-a refractory tank; 3-treating the container; 4-a negative pressure assembly; a 5-separation layer assembly; 6-a discharge assembly; 7-an adjusting piece; 8-a toggle piece; 21-cliff; 22-an oxygen barrier cover; 23-adjusting the groove; 24-hinging seat; 25-pressing the strips; 26-adjusting the steel cord; 27-a return spring; 28-an anti-sticking cover body; 31-a discharge slot; 41-fixing seats; 42-negative pressure pump body; 43-oxygen pumping steel pipe; 44-blowing steel pipes; 51-guiding tracks; 52-collecting the frame body; 53-overflow trough; 54-convex slope; 61-wind cavity; 62-fan blades; 63-rotating shaft; 64-torsion spring; 65-a cylindrical barrel; 71-a mounting plate; 72-adjusting the rod; 73-winding a cylinder; 74-rotating the adjustment shaft block; 81-a telescopic rod; 82-connecting plates; 83-helical track; 84-sliding blocks; 85-a toggle rod; 86-fixing sleeve; 87-bent rod; 88-sweep bar.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-12, the present invention provides a technical solution: the aluminum impurity purification device for recycling aluminum scraps is designed to solve the problems that when the existing aluminum scraps are heated by a melting furnace body 1 to be in a molten state and discharged by a refractory tank body 2, an impurity layer is mixed in discharged aluminum liquid due to oxygen in air and other impurities, the impurity layer is required to be discharged in order to keep the aluminum liquid clean, and when the existing rod is used for discharging the impurity layer, the pollution of the aluminum layer is caused; the outer side of the refractory tank body 2 is connected with a negative pressure component 4, one end of the negative pressure component 4 is connected with an oxygen isolation cover body 22, the other end of the negative pressure component 4 is connected with a treatment container body 3, and the bottom of the treatment container body 3 is connected with a discharge notch 31; the inside of handling the appearance body 3 is equipped with separating layer subassembly 5 of separation aluminium liquid and impurity membrane, and separating layer subassembly 5 intermediate position is equipped with the exhaust subassembly 6 of separating layer subassembly 5's bottom clearance, and the one end of exhaust subassembly 6 is connected and is installed in the one end department of handling the appearance body 3 at negative pressure subassembly 4.

Through setting up cliff 21 between refractory tank body 2 and handling appearance body 3, effectively avoid aluminium liquid backward flow, simultaneously because set up negative pressure assembly 4 in the top department of refractory tank body 2, thereby be favorable to taking out the part with the air of refractory tank body 2 department, be convenient for keep the aluminium of refractory tank body 2 department at negative pressure entering separation layer assembly 5 department, utilize separation layer assembly 5 to filter the separation with the impurity layer in the aluminium liquid, simultaneously utilize the negative pressure air of taking out to drive discharge subassembly 6, collect filterable impurity layer, make aluminium liquid keep the spiral to follow discharge notch 31 and discharge, in comparison current aluminium liquid discharge process, mixed other impurity layers in the aluminium layer have been reduced, be convenient for aluminium liquid discharges fast, and the secondary pollution to the aluminium liquid in the filtration process has been reduced

In order to be applicable to different refractory tank bodies 2, through adjusting in the outside of the oxygen isolation cover body 22, the oxygen isolation cover body 22 is modulated to be in a corresponding arch shape, referring to fig. 10 and 12, a plurality of adjusting grooves 23 are formed in the outside of the oxygen isolation cover body 22, a hinge seat 24 is connected to each adjusting groove 23, one side of the hinge seat 24 is connected with a pressing strip 25, one end of the pressing strip 25 is connected to the outside of the refractory tank body 2 through a support plate, the other side of the hinge seat 24 is connected with an adjusting steel rope 26, an adjusting piece 7 is connected between the plurality of adjusting steel ropes 26, a reset spring 27 is connected between two sides of the hinge seat 24, and an anti-sticking cover body 28 is connected to the inside of the oxygen isolation cover body 22. The adjusting piece 7 includes the mounting panel 71 of connecting in fire-resistant cell body 2 one side, and be connected with adjusting lever 72 on the mounting panel 71, the last winding barrel 73 that is connected with a plurality of windings of adjusting steel rope 26 of adjusting lever 72, the one end of adjusting lever 72 is connected with and rotates adjusting spindle piece 74, when needs are with the crooked radian of oxygen isolation cover body 22 adjustment in order to adapt to fire-resistant cell body 2, personnel rotate through handheld rotation adjusting spindle piece 74 position department for adjusting lever 72 begins to rotate, because the adjusting lever 72 outside is through winding barrel 73 winding of adjusting steel rope 26, so be convenient for carry out the pressfitting processing with three adjusting steel rope 26 simultaneously, because the one end of adjusting steel rope 26 carries out the pressfitting processing through articulated seat 24 and pressfitting strip 25, in adjusting steel rope 26 is pulled the in-process, be convenient for the strip 25 to be pressurized the oxygen isolation cover body 22 and make its crooked corresponding arch, the oxygen isolation cover body 22 among this scheme can be selected high temperature resistant and have elastic steel sheet material, the design is in order to keep fire-resistant cell body 2 to have certain space in order to keep the oxygen isolation cover body 2, avoid high temperature's aluminium liquid direct contact to the oxygen isolation cover body 22 surface, simultaneously prevent that the oxygen isolation cover body from splashing when a large amount of aluminium liquid from contacting the oxygen isolation cover body 22 when the oxygen isolation cover body 22 is connected in order to prevent that the oxygen isolation body 22 from having the surface to prevent to splash to prevent.

When the outside of the refractory tank body 2 is isolated by the oxygen isolation cover body 22, in order to extract air at the gap, referring to fig. 4-5, the negative pressure assembly 4 comprises a fixed seat 41 connected to the outside of the refractory tank body 2, the fixed seat 41 is connected with a negative pressure pump body 42, the negative pressure pump body 42 is connected with an oxygen extraction steel pipe 43, one end of the negative pressure pump body 42 is connected with a blowing steel pipe 44, the blowing steel pipe 44 is communicated with the top of the treatment container body 3, in the scheme, the negative pressure pump body 42 extracts air at the gap of the refractory tank body 2 from the oxygen isolation cover body 22 and the anti-sticking cover body 28 through the oxygen extraction steel pipe 43, so that the upper part of the refractory tank body 2 is in a negative pressure state, aluminum liquid is pumped from the smelter body 1 to the refractory tank body 2, the aluminum liquid is conveniently separated, meanwhile, the negative pressure state is favorable for keeping the stable transition of the aluminum liquid separation process, the aluminum liquid is prevented from splashing, and the extracted air plays a stirring role in the process of leading the aluminum liquid into the guide rail 51.

After the aluminum liquid falls into the guide rail 51 from the cliff 21, the guide rail 51 is spiral, so that the aluminum liquid is discharged downwards in a spiral shape, because in the scheme, a baffle plate for preventing splashing is arranged at the position of the guide rail 51 close to the cliff 21, and particularly referring to fig. 8, one end of the guide rail 51 is arranged at the cliff 21, the other end of the guide rail 51 is connected with a collecting frame 52 penetrating through the treatment container 3, a plurality of overflow grooves 53 for discharging the aluminum liquid are arranged on the guide rail 51, the discharging assembly 6 is positioned at the middle position of the guide rail 51, the top of the discharging assembly 6 is contacted with the blowing steel pipe 44, a convex slope 54 is connected at the collecting frame 52, the aluminum liquid gradually slides along the spiral shape under the gravity of the mixture, the aluminum liquid is positioned at the lower layer, falls from the overflow groove 53 to the treatment container 3, then is discharged along the position of the discharging groove 31, then other impurity layers of the upper layer are separated at the guide rail 51, the convex slope 54 designed in the scheme is prevented from directly flushing the aluminum liquid into the collecting frame 52, and the impurity layers are filtered and then concentrated on the convex slope 54 after passing through the convex slope 52.

To avoid accumulation of filtered impurities at the guide rail 51, cleaning of the overflow trough 53 is required, and the drain assembly 6 comprises a wind chamber 61 connected at the top cover of the treatment vessel 3, as shown in fig. 7. And the steel blowing pipe 44 is positioned at the wind cavity 61, the wind cavity 61 is provided with a fan blade 62, the bottom of the fan blade 62 is connected with a rotating shaft 63, a torsion spring 64 is connected between the rotating shaft 63 and the inner wall of the wind cavity 61, the middle position of the guide rail 51 is connected with a cylindrical barrel 65, the cylindrical barrel 65 is connected with a stirring piece 8, the top of the stirring piece 8 is connected with the rotating shaft 63, and the outer side of the stirring piece 8 stirs the bottom of the guide rail 51. The stirring piece 8 comprises a telescopic rod 81 connected to the bottom of the rotating shaft 63, a connecting plate 82 is connected to the bottom of the telescopic rod 81, a spiral track 83 is formed in the cylindrical barrel 65, the connecting plate 82 is connected with a sliding block 84 at the position of the spiral track 83, a stirring rod 85 stirring the guide track 51 is connected to the outer side of the sliding block 84, negative-pressure pumped gas is discharged to the wind cavity 61 under the action of a timing valve at the outer side of the blowing steel pipe 44, and then the fan blade 62 is driven to rotate, because the fan blade 62 is fixed to the rotating shaft 63, the rotating shaft 63 is fixedly connected with the telescopic rod 81, the sliding block 84 mounted on the connecting plate 82 at the bottom of the telescopic rod 81 slides along the position of the spiral track 83, the trend of the spiral track 83 in the scheme simulates the guide track 51, the stirring rod 85 is convenient to stir the position of the overflow groove 53, then the closing gas is controlled to enter the blowing steel pipe 44, and reverse rotation of the telescopic rod 81 is realized under the action of the torsion spring 64, so that the stirring rod 85 is restored to the original position.

In this scheme, in order to avoid aluminium liquid to directly pile up in guide rail 51 exit, utilize the outside of telescopic link 81 to be connected with fixed cover 86, and fixed cover 86 outside equiangular connection has a plurality of curved bars 87, and the one end of curved bar 87 is connected with sweeps pole 88, when telescopic link 81 is driven the rotation, a plurality of sweeps pole 88 are convenient for sweep into guide rail 51 from the new aluminium liquid of same floor and discharge.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Aluminum impurity purification device for recycling aluminum scraps comprises a melting furnace body (1) and a refractory groove body (2) connected with the melting furnace body (1), and is characterized in that: one end of the refractory tank body (2) is connected with a treatment container body (3), a cliff port (21) for preventing aluminum liquid from flowing backwards is arranged between the refractory tank body (2) and the treatment container body (3), and an oxygen isolation cover body (22) is arranged on the outer side of the refractory tank body (2);

the outer side of the refractory tank body (2) is connected with a negative pressure component (4), one end of the negative pressure component (4) is connected with an oxygen isolation cover body (22), the other end of the negative pressure component (4) is connected with a treatment container body (3), and the bottom of the treatment container body (3) is connected with a discharge notch (31);

the inside of handling appearance body (3) is equipped with separating layer subassembly (5) of separation aluminium liquid and impurity membrane, the centre department of separating layer subassembly (5) is equipped with discharge subassembly (6) of the bottom clearance of separating layer subassembly (5), and the one end of discharge subassembly (6) is connected in negative pressure subassembly (4) and is installed in the one end department of handling appearance body (3).

2. An aluminum impurity purification apparatus for recovering aluminum scrap as defined in claim 1, wherein: the oxygen isolation cover body (22) is provided with a plurality of adjusting grooves (23) in the outer side, each adjusting groove (23) is connected with a hinge seat (24), one side of each hinge seat is connected with a pressing strip (25), one end of each pressing strip (25) is connected to the outer side of the fire-resistant groove body (2) through a supporting plate, the other side of each hinge seat (24) is connected with an adjusting steel rope (26), an adjusting piece (7) is connected between the adjusting steel ropes (26), a reset spring (27) is connected between two sides of each hinge seat (24), and the inner side of each oxygen isolation cover body (22) is connected with an anti-sticking cover body (28).

3. An aluminum impurity purification apparatus for recovering aluminum scrap as defined in claim 2, wherein: the adjusting piece (7) comprises a mounting plate (71) connected to one side of the fireproof groove body (2), an adjusting rod (72) is connected to the mounting plate (71), a winding cylinder (73) connected with a plurality of winding adjusting steel ropes (26) is connected to the adjusting rod (72), and a rotating adjusting shaft block (74) is connected to one end of the adjusting rod (72).

4. An aluminum impurity purification apparatus for recovering aluminum scrap as defined in claim 1, wherein: the negative pressure assembly (4) comprises a fixed seat (41) connected to the outer side of the refractory tank body (2), a negative pressure pump body (42) is connected to the fixed seat (41), an oxygen pumping steel pipe (43) is connected to the negative pressure pump body (42), an air blowing steel pipe (44) is connected to one end of the negative pressure pump body (42), and the air blowing steel pipe (44) is communicated to the top of the treatment container body (3).

5. An aluminum impurity purification apparatus for scrap aluminum recovery as defined in claim 4, wherein: separating layer subassembly (5) are including guide rail (51), and guide rail (51) are the heliciform, the one end of guide rail (51) sets up in cliff (21) department, and the other end of guide rail (51) is connected with and passes collection framework (52) of handling appearance body (3), be equipped with multichannel discharge aluminium liquid overflow launder (53) on guide rail (51), discharge subassembly (6) are located the intermediate position department of guide rail (51), and the top and the steel pipe (44) contact of blowing of discharge subassembly (6).

6. An aluminum impurity purification apparatus for recovering aluminum scrap as defined in claim 5, wherein: the exhaust assembly (6) comprises a wind cavity (61) connected to the top cover of the treatment container (3), a blowing steel pipe (44) is located at the wind cavity (61), a fan blade (62) is arranged at the wind cavity (61), a rotating shaft (63) is connected to the bottom of the fan blade (62), a torsion spring (64) is connected between the rotating shaft (63) and the inner wall of the wind cavity (61), a cylindrical barrel (65) is connected to the middle position of the guide rail (51), a stirring piece (8) is connected to the cylindrical barrel (65), the top of the stirring piece (8) is connected with the rotating shaft (63), and the bottom of the guide rail (51) is stirred at the outer side of the stirring piece (8).

7. An aluminum impurity purification apparatus for recovering aluminum scrap as defined in claim 6, wherein: the toggle piece (8) comprises a telescopic rod (81) connected to the bottom of the rotating shaft (63), a connecting plate (82) is connected to the bottom of the telescopic rod (81), a spiral track (83) is formed in the cylindrical barrel (65), a sliding block (84) is connected to the connecting plate (82) located at the spiral track (83), and a toggle rod (85) toggling the guide track (51) is connected to the outer side of the sliding block (84).

8. An aluminum impurity purification apparatus for scrap aluminum recovery as defined in claim 7, wherein: the outside of telescopic link (81) is connected with fixed cover (86), and is connected with a plurality of curved bars (87) with equal angles in fixed cover (86) outside, and the one end of curved bar (87) is connected with sweeps pole (88).

9. An aluminum impurity purification apparatus for recovering aluminum scrap as defined in claim 5, wherein: the guide rail (51) is connected with a protruding slope (54) at the position of the collecting frame body (52).